feat: 添加智能记账AI服务，包括聊天、语音输入、交易确认和财务建议，并集成到首页展示。

src/services/aiService.ts

@@ -319,6 +319,7 @@ export interface DailyInsightContext {
   // 分类分析
   topCategory?: { name: string; amount: number };
   top3Categories?: { name: string; amount: number }[]; // 本月前三分类
+  recentTransactions?: { date: string; categoryName: string; amount: number; type: string; note?: string }[]; // 最近7天交易详情
 
   // 交易详情
   maxTransaction?: { note: string; amount: number };
@@ -333,7 +334,9 @@ export interface DailyInsightContext {
  */
 export async function getDailyInsight(context: DailyInsightContext): Promise<{ spending: string; budget: string; emoji?: string; tip?: string }> {
   // Hash needs to include new fields
-  const currentHash = JSON.stringify(context);
+  // Simplify recentTransactions for hash to avoid order issues or too long string
+  const contextForHash = { ...context, recentTransactions: context.recentTransactions?.length };
+  const currentHash = JSON.stringify(contextForHash);
   const NOW = Date.now();
   const CACHE_TTL = 30 * 60 * 1000; // 30 Minutes
 
@@ -348,6 +351,12 @@ export async function getDailyInsight(context: DailyInsightContext): Promise<{ s
   const weekday = new Date().toLocaleDateString('zh-CN', { weekday: 'long' });
   const weekDiff = context.lastWeekSpend !== undefined ? (context.todaySpend - context.lastWeekSpend) : 0;
 
+  // Format recent transactions for AI (simplify to save tokens)
+  const formattedTransactions = context.recentTransactions
+    ?.slice(0, 50) // Limit to 50 items
+    .map(t => `${t.date}: ${t.categoryName} ${t.type === 'expense' ? '-' : '+'}${t.amount.toFixed(1)}${t.note ? ` (${t.note})` : ''}`)
+    .join('\n');
+
   // Prepare enriched context for the backend
   // We format some fields to help the AI understand better (like percentages)
   const enrichedContext = {
@@ -356,7 +365,8 @@ export async function getDailyInsight(context: DailyInsightContext): Promise<{ s
     weekDiff,
     date: new Date().toLocaleDateString('zh-CN'),
     monthProgressPercent: `${(context.monthProgress * 100).toFixed(0)}%`,
-    budgetUsedPercent: `${(context.monthlySpent / (context.monthlyBudget || 1) * 100).toFixed(0)}%`
+    budgetUsedPercent: `${(context.monthlySpent / (context.monthlyBudget || 1) * 100).toFixed(0)}%`,
+    recentTransactionsSummary: formattedTransactions // Send as specific field
   };
 
   try {